Description:The cover offers a reliable protection of rain resistance, protecting backpack from scratch, dirt, sand.The exterior layer adopts wear-resistant Nylon to avoid scratching and dirt. The inner layer adopts waterproof coating to avoid rain and snow.To adjust the cover to fit your backpack. It will make the cover stick to the backpack to avoid falling off.Can be easily folded so that you can put it in the side bag of your backpack to save space.Elastic rain cover, hot stamping reflective strip, suitable for outdoor activities and perfect for outdoor travel, riding, climbing, hiking and so on.Specification:Material: Nylon(190T Inner Coated Silver)Size Chart:35L: 55x40cm/21.65x15.75inch,45L: 60x44cm/23.62x17.32inch,60L: 67x47cm/26.38x18.5inch,70L: 80x53cm/31.5x20.87inch,80L: 85x60cm/33.46x23.62inch.Package Includes:1 Piece Reflective Backpack Rain Cover.Note:Color might be slightly different due to the color calibration of each individual monitor.Please allow slightly measuring deviation due to manual measurement.